Thermal analysis in peristaltic pumping: Effects of surface roughness and channel geometries

This study investigates the thermal analysis of couple stress fluid flow driven by peristaltic pumping, focusing on the impact of surface roughness and channel geometry on fluid flow behavior and thermal properties. The analytical model examines the heat transfer behavior of couple stress fluid flow across smooth and rough surfaces, quantifying flow characteristics such as axial velocity, pressure gradient, and skin friction. A parametric analysis is conducted to examine the effects of key parameters, including the Grashof number, heat source parameter, and couple stress parameter, on flow characteristics and thermal properties. This study reveals that surface roughness and channel geometry significantly affect fluid flow behavior, altering thermal properties such as temperature distribution, heat transfer rate, and entropy generation. The findings provide insight into optimizing fluid flow and thermal management in microfluidic devices and cooling channels, particularly by reducing resistance. Key output parameters for these enhancements include reduced entropy generation, improved axial velocity, optimized pressure distribution, and better heat transfer efficacy. This study provides a benchmark for future research exploring various geometries of channel obstructions, surface modulations, and rheological properties of fluids with diverse thermal boundary conditions. The results have significant implications for the development of efficient biomedical devices and industrial applications.